on . Posted in Electrical Engineering

Conductance, abbreviated as G, refers to the ability of a material to allow the flow of electric current.  It is the reciprocal of electrical resistance.  The higher the conductance, the better the material conducts electricity.

In the context of electricity, materials are often classified as conductors, insulators, or semiconductors based on their conductance properties. Metals, for example, are good conductors, while rubber is a good insulator.  Semiconductors have properties that fall between conductors and insulators and are fundamental to the operation of electronic devices like transistors.

It's worth noting that conductance is a measure of the ease with which electric current flows through a material, whereas conductivity is a material property that describes how well a material conducts electricity.  Conductivity is the product of the material's conductance and the cross-sectional area through which the current flows, divided by the distance along which the current travels.


Conductance formula

\( G  =  P \;/\; V^2 \)     (Conductance)

\( P  =  G \; V^2  \)

\( V  =  \sqrt{ P \;/\; G  }  \)

Symbol English Metric
\( G \) = conductance  \( A \)  \(C\;/\;s\) 
\( P \) = power \( W \)  \(kg-m^2\;/\;s^3\)
\( V \) = voltage \(V\) \(kg-m^2\;/\;s^3-A\)


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Tags: Electrical